A friend of mine is going through some hard times.

Sometimes, there's nothing anyone can do, except be there.

No often there isn’t anything we can do but be available when they need a sounding board

Just tell that friend he/she has an open line with you should it happen that he/she could use some company either to talk or sit in silence together

Sometimes there really is no need for grand things. All that is needed is for you to mean and act on whatever you offer